Gonna do the NH-D14. the place I get parts from is always out of the 15 . At least I save 40 bux. I still would rather get the 15. but the 14 is still a great cooler.. plus did a check to make sure it works on their website. msi x99 sli board no issues and gskill pc4-24000 still no issues with height. So good to go.. just trying to decide on case. Maybe h440 nzxt. Corsair 760t here is so hard to get. they are always out